Ring binder construction



Feb. 16,1943. 'J.$CHADE v 231L089 RING BINDER CONSTRUCTION Filed Sept. 25. 1941 INVENTOR J/m Jew/10E Y dgazwf 7/ ATTORNEYS Patented Feb. 16, 1943 R-IN G BINDER CONSTRUCTION John Schade, Holyoke, Mass, assignor to National Blank Book Company, Holyoke, Mass, a corporation of Massachusetts Application September 23, 1941, Serial No. 411,958

2 Claims.

This invention relates to improvements in ring binder book construction. Its principal object is to make a more economical construction without losing the mechanical efficiency of the cus-- tomary construction but in fact improving such efliciency in some particulars. I will disclose the means by which this result is accomplished. Other detail objects will be referred to in the disclosure.

Referring to the drawing: v

Fig. 1 shows a plan view of my new ring binder with the covers broken off to save space;

Fig. 2 shows a plan view of one of the spring clips;

Fig. 3 is an end view from the right of Fig. 2;

Fig. 4 is an end view from the left of Fig. 2; and

Fig. 5 is a section on line 55 of Fig. 1 through the portion of the clip construction adjacent its rivet.

To make the book of Fig. 1, I provide the binding case indicated. It is made of covers I hinged to the back panel 2. In my construction this back panel may be made without metal or like reenforcement such as is customarily used to hold its curved book back shape. For example, it is now customary to make the back panel of cardboard stock pressed into the curved shape transversely and reenforce the cardboard with metal strips. The F. S. Schade Patent No. 1,983,883, granted December 11, 1934,v shows the prior art in this respect.

According to my invention I do not need such metal strips. As I will point out, their function is performed by other means and with more economy. This means consists in the particular formation of the spring clip 6 of Fig. 2. Its form is seen in additional respects from Figs. 3, 4 and 5. Two of such clips are seen in Fig. l as assembled and combined in the ring binder. I will now explain the assembly and the cooperating functions of the parts.

In this construction as shown, I use a wire frame toggle mechanism. The generally parallel Wires 3 of the toggle are bent at the ends to form.

the end ring halves 4. I show a third ring construction 5 intermediate the end rings. In such third ring the halves are merely welded to the wire frame. The most economical book is of the two ring construction. However, the third ring 5 is sometimes desired and can be supplied at the very slight addition-a1 cost, as pointed out. My construction is well adapted to add it when desired. The toggle mechanism with a toggle joint I of the wire frame kind per se is well known; For example, see Patent No. 2,091,188 of 1937 or No. 1,556,416 of 1925.

This wire frame is assembled with the two spring clips '6 having the characteristics and in the position of those shown. In this position the rivets 8 are inserted and headed.

It will be seen that the clips so fastened act in the assembly to perform the function of a spring plate. customarily a spring plate extends from one end of the wire frame to the other. It is riveted to the back panel in the prior art with the disadvantage of tending to bend the curved back panel out of form in the riveting operation. It will be seen in my construction that in the region of the rivets the'clips have portions 9 in contact with the curved panel. These portions are so shaped and positioned as to maintain the curved form of the back panel. No matter how tightly the heads of the rivet are fastened, there is no space under the clips into which the back panel can be easily bent. Therefore, such back panel is kept in form and not deformed by the riveting action. The panel under my invention does not need the more expensive construction as heretofore used in building it to resist deformation. The portions II], II, and [2 in Fig. 5 do this work, the portion l0 probably being sufficient alone but this is nevertheless supplemented by the others for further safeguarding the back panel. Or the. portion I0 might be bent to give more contact than in the specific form illustrated.

A useful result in addition to the economy of the construction, is the very light weight of the book. This is accomplished without any substantial lessening of its efliciency. The toggle mechanism works with remarkable efficiency with the clips as shown. It would not work better with a full length spring plate. The clips perform not only such prior art plate function but also give advantages in supporting the back panel which the spring plate does not do when made of the usual cover plate kind. Some but not all of the advantages above referred to can be secured if the back panel is made fiat in cross section rather than curved as specifically illustrated.

What I claim is:

l. A ring binder construction comprising a curved back panel with hinged covers, a wire frame toggle mechanism of the kind having two generally parallel spaced wires with portions near each end bent horizontally to make toggle joints and with end portions bent to make two vertically arranged end rings, spring clips, one

covering each of the bent toggle joints, each clip having an upwardly arched cover portion and bent under side edges to hold the wires in position and a riveting portion comprising a downwardly arched portion curved to make a substantial reenforcing contact with said back panel, said last mentioned arched portion of each clip being riveted to the back panel, the downwardly arched portions of said clips being located between the spaced wires of the toggle mechanism.

2. A ring binder construction comprising a transversely curved back panel with hinged covers, a wire frame toggle mechanism of the kind having two generally parallel spaced wires with portions near each end bent horizontally to make toggle joints and with end portions bent to make two vertically arranged end rings, spring clips, one covering each of the bent toggle joints, each clip having an upwardly arched cover portion and bent under side edges to hold the wires in position, said edges of each clip being positioned to contact along opposite side portions of the curved back panel and above its bottom portion, each clip having located between said edges a riveting portion comprising a downwardly arched portion curved to make a substantial reenforcing contact with said back panel and on its bottom portion between said opposite side portions in contact with said side edges above the bottom portions, said downwardly arched portion of each clip being rivetedto the back panel at a point between said bent toggle joints.

JOHN SCHADE. 

